GLOSSARY. 



Abortive. Sterile; reproductive parts 



failing to develop. 



AcaulescenL Stemless or apparently 



so, or with the stem underground. 



A cerose. Needle-shaped ; with a sharp 



rigid point. 



Acrid. Sharp and harsh to the taste. 

 Adnate. United, especially where 



different organs are fused. 

 Adventive. Coming from a different 

 region and not thoroughly natur- 

 alized. 

 Akene. A dry, one-celled, one-seeded, 



indehiscent fruit. 



Alveolate. Resembling a honeycomb. 

 Ament. A catkin; a scaly spike. 

 Amphitropous (ovule or seed). Half- 

 inverted and straight but with a 

 lateral hilum. 



Ampliate. Abruptly expanded. 

 Anastomose. To connect by cross- 

 veins and form a network. 

 Anatropous (ovule or seed). In- 

 verted and straight with the mi- 

 cropyle next to the hilum. 

 Androgynous. Having both stami- 



nate and pistillate flowers. 

 Annular. In the form of a ring. 

 Annulus. A ring, especially the 

 ring of thick-walled cells on a fern 

 sporangium. 

 Anthesis. The period of full bloom 



of a flower. 

 Apiculate. Ending in a short pointed 



tip. 

 Appressed. Lying close and flat 



against something. 

 Arachnoid. Cobwebby. 

 Arcuate. Curved in the form of a 



bow. 

 Aristate. Tipped with a stiff short 



bristle. 



Atomiferous. Bearing minute scat- 

 tered granules. 



Auricle. An ear-shaped appendage. 

 Awn. A bristle-like terminal or 

 dorsal appendage. 



Barbellate. Minutely barbed. 

 Bifid. Two-cleft. 



Bilabiate. Two-lipped. 

 Biternate. Twice-ternate. 

 Bract. A modified reduced leaf oc- 

 curring in the inflorescence. 

 Bracteate. Having bracts. 

 Bracteolate. Having small bracts. 



Callosity. A hardened thickening. 



Callus. A hard protuberance; in the 

 grasses, the tough often hairy 

 swelling at the base of the lemma or 

 palea. 



Calyculate. Having bracts around a 

 flower or head which imitate or 

 resemble a calyx. 



Campanulate. Bell-shaped, that is 

 cup-shaped with a broad base. 



Canescent. Hoary with a grayish 

 pubescence. 



Capillary. Hair-like. 



Capitate. Shaped like a head; col- 

 lected into a head. 



Carinate. With a keel. 



Carpel. A simple pistil or one of the 

 units of a compound pistil. 



Carpophore. The slender prolonga- 

 tion of the axis which bears the ripe 

 carpels in the Umbclliferae. 



Cartilaginous. Firm and tough, car- 

 tilage-like. 



Caryopsis. A grain, that is a seed- 

 like fruit with a thin wall adherent 

 to the single enclosed seed as in 

 the grasses. 



Caudex. The persistent base of an 

 otherwise annual herbaceous stem. 



Caudicula. The thread-like or strap- 

 shaped stalk of a pollinium. 



Caulicle. The stem-like part of an 

 embryo, the hypocotyl. 



Catiline. Pertaining to the stem; 

 on the stem. 



Cernuous. Nodding; slightly droop- 

 ing. 

 Ces pilose. Growing in tufts; forming 



mats. 

 Chaff. A small thin bract becoming 



dry and membranous. 

 Chartaceous. Papery. 



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